diff options
| -rw-r--r-- | Documentation/devicetree/bindings/watchdog/marvel.txt | 2 | ||||
| -rw-r--r-- | drivers/watchdog/orion_wdt.c | 24 |
2 files changed, 25 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/marvel.txt b/Documentation/devicetree/bindings/watchdog/marvel.txt index 5dc8d30061ce..0731fbd2de83 100644 --- a/Documentation/devicetree/bindings/watchdog/marvel.txt +++ b/Documentation/devicetree/bindings/watchdog/marvel.txt @@ -7,6 +7,7 @@ Required Properties: Optional properties: +- interrupts : Contains the IRQ for watchdog expiration - timeout-sec : Contains the watchdog timeout in seconds Example: @@ -14,6 +15,7 @@ Example: wdt@20300 { compatible = "marvell,orion-wdt"; reg = <0x20300 0x28>; + interrupts = <3>; timeout-sec = <10>; status = "okay"; }; diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c index e10b0b1accce..b7067acd43a2 100644 --- a/drivers/watchdog/orion_wdt.c +++ b/drivers/watchdog/orion_wdt.c @@ -19,6 +19,7 @@ #include <linux/platform_device.h> #include <linux/watchdog.h> #include <linux/init.h> +#include <linux/interrupt.h> #include <linux/io.h> #include <linux/clk.h> #include <linux/err.h> @@ -119,10 +120,16 @@ static struct watchdog_device orion_wdt = { .min_timeout = 1, }; +static irqreturn_t orion_wdt_irq(int irq, void *devid) +{ + panic("Watchdog Timeout"); + return IRQ_HANDLED; +} + static int orion_wdt_probe(struct platform_device *pdev) { struct resource *res; - int ret; + int ret, irq; clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(clk)) { @@ -161,6 +168,21 @@ static int orion_wdt_probe(struct platform_device *pdev) if (!orion_wdt_enabled()) orion_wdt_stop(&orion_wdt); + /* Request the IRQ only after the watchdog is disabled */ + irq = platform_get_irq(pdev, 0); + if (irq > 0) { + /* + * Not all supported platforms specify an interrupt for the + * watchdog, so let's make it optional. + */ + ret = devm_request_irq(&pdev->dev, irq, orion_wdt_irq, 0, + pdev->name, &orion_wdt); + if (ret < 0) { + dev_err(&pdev->dev, "failed to request IRQ\n"); + goto disable_clk; + } + } + watchdog_set_nowayout(&orion_wdt, nowayout); ret = watchdog_register_device(&orion_wdt); if (ret) |